VJamm supports the 'FreeFrame' video effects plugin standard, giving access to an ever increasing number of VJ effects. Also, using 'PeteFreeChain' you can create your own effects by linking up existing effects and saving out your new plugin.
FreeFrame plugins can now be found to do just about anything to your video, eg. routing video from one app to another, providing live input and video synthesizers ...
Over 200 plugins are now listed on the VJamm FreeFrame Support Page - many of them free and open source
To try out new plugins in VJamm simply download them from the authors and put them in your VJamm plugins folder.
Alternatively the FreeFrame Gallery provides an excellent way of browsing and viewing a large number of FreeFrame effects